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Nondestructive measurement of cross-sectional shape of a tree trunk

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/47097

Title: Nondestructive measurement of cross-sectional shape of a tree trunk
Authors: Koizumi, Akio Browse this author
Ikeda, Keisuke Browse this author
Sawata, Kei Browse this author
Hirai, Takuro Browse this author
Keywords: nondestructive evaluation
section modulus
windthrow resistance
tree trunk
drill resistance technique
Issue Date: Aug-2011
Publisher: Springer
Journal Title: Journal of Wood Science
Volume: 57
Issue: 4
Start Page: 276
End Page: 281
Publisher DOI: 10.1007/s10086-011-1174-1
Abstract: To evaluate windthrow resistance with respect to stem breakage, a nondestructive method for determining the shape of trunk cross sections was developed. In this method, the coordinates of multiple gauge points set on the perimeter of a trunk are calculated by measuring the distances between them. The shape between the gauge points is generated with the use of a profile gauge placed between them. Measurement tests were conducted using profile gauges with lengths of 300 and 900 mm on model specimens with four shape patterns and four different diameters. The accuracy of the estimation was verified by comparing the section modulus calculated for the generated image and for the photograph. The average ratio of section modulus (generated/photo) for all specimens was 0.994, which indicates that the proposed method is highly accurate. The section moduli of hollow trunks can be evaluated using the profile method together with the drill resistance technique on the condition that 26% of the trunk diameter could be drilled without skew.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/47097
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小泉 章夫

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